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Preparation method for ultrathin magnesium alloy strip

A magnesium alloy, ultra-thin technology, applied in metal rolling and other directions, can solve the problems of limited grain refinement effect and waste of energy, and achieve the effect of fine and uniform grain, low investment and energy saving

Inactive Publication Date: 2014-11-05
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, magnesium and magnesium alloy ultra-thin plates (strips) are generally prepared by hot rolling process, and heat preservation is required for each pass, which wastes energy and has limited grain refinement effect

Method used

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  • Preparation method for ultrathin magnesium alloy strip
  • Preparation method for ultrathin magnesium alloy strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The pure Mg element and Er element are used to prepare the alloy according to Mg-4Er (mass ratio). The solid solution magnesium alloy ingot was kept at 773K for 24 hours under the protection of an inert gas, and then water quenched to perform solid solution treatment on the ingot. Cut the solution-treated billet into 4mm thickness for hot rolling and deformation. The absolute temperature of hot rolling is 667K. The hot rolling is carried out in multiple passes, and the deformation of each pass is controlled at 10%, supplemented by intermediate annealing. The amount of deformation reaches 75%, and the thickness of the plate is rolled to about 1mm, and then annealing is carried out at an absolute temperature of 673K ​​for 30 minutes to improve the plasticity of the plate. Under room temperature conditions, the annealed hot-rolled plate is cold-rolled with a deformation of 50% in the first pass, and can be cold-rolled into an ultra-thin strip (foil) with a thickness of 0.0...

Embodiment 2

[0030] The pure Mg element and Zn element are used to prepare the alloy according to Mg-1Zn (mass ratio). The prepared solid solution magnesium alloy ingot was kept at 723K for 24 hours under the protection of an inert gas, and then water quenched, and the ingot was subjected to solution treatment. Cut the solution-treated ingot into 8mm thickness for hot rolling and deformation. The hot rolling temperature is 800K. The hot rolling is carried out in multiple passes. The deformation of each pass is controlled at 9%, supplemented by intermediate annealing. The total deformation To reach 150%, the plate thickness is rolled to about 1mm, and then annealed at 690K for 30 minutes to improve the plasticity of the plate. Under room temperature conditions, the annealed hot-rolled plate is cold-rolled with a deformation of 60% in the first pass, and can be cold-rolled into an ultra-thin strip (foil) with a thickness of 0.1mm through multiple passes. The maximum reduction can reach 95%,...

Embodiment 3

[0033] The pure Mg element and Dy element are used to prepare the alloy according to Mg-6Dy (mass ratio). The solid solution magnesium alloy ingot was kept at 803K for 24 hours under the protection of an inert gas, and then water quenched, and the ingot was subjected to solution treatment. Cut the solution-treated ingot into 6mm thickness for hot rolling deformation, hot rolling for multi-pass rolling, the deformation of each pass is controlled at 5%, supplemented by intermediate annealing, the total deformation reaches 90%, the plate The thickness is rolled to about 1mm, and then annealed at 773K for 30 minutes to improve the plasticity of the plate. Under room temperature conditions, the annealed hot-rolled plate is cold-rolled with a deformation of 70% in the first pass, and can be cold-rolled into an ultra-thin strip (foil) with a thickness of one pass. The total reduction can reach 95%, and the rolling elongation can reach 1000%. Except for edge cracks caused by large r...

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Abstract

The invention provides a preparation method for an ultrathin magnesium alloy strip. The method comprises the following steps: maintaining a solid solution type magnesium alloy cast ingot at 723 to 803 K for 24 h under the protection of inert gas, carrying out water quenching and then subjecting the ingot blank to solid solution treatment; cutting the cast ingot having undergone solid solution treatment to desired thickness and size, carrying out multi-pass rolling in a hot-working state, wherein the total deformation is greater than 60%, and subjecting a hot-rolled plate to annealing at 673 to 773 K for 30 min; and carrying out first-pass cold rolling with deformation of greater than 50% on the annealed hot-rolled plate, wherein ultrathin strips (foils) with different thickness can be prepared through one or multi-pass cold rolling. Maximum rolling reduction reaches 95%, and percentage of elongation at the rolling direction reaches 1000%. Except edge cracks caused by great rolling reduction, the cold-rolled ultrathin strip has a perfect integral surface. After edge trimming, the ultrathin magnesium alloy strip with uniform thickness and high quality can be obtained. After annealing, a cold-rolled plate has uniform crystal grains and excellent mechanical properties.

Description

technical field [0001] The invention relates to the field of magnesium alloy processing, in particular to a method for preparing ultra-thin strips of magnesium alloy by cold rolling. Background technique [0002] The development and application of wrought magnesium alloys has attracted more and more attention due to the demand for lightweighting of automobiles, aviation, aerospace, electronics, and office systems, as well as environmental protection issues. Although my country is a major producer and exporter of magnesium, magnesium alloy plates (strips), especially in the fields of precision electronic appliances, high-power magnesium anode batteries, and aerospace fields, need to be applied to ultra-thin magnesium with a thickness of less than 0.5mm. Most of the deep-processed products such as alloy plates (strips) rely on imports. At present, the final rolling stage of the ultra-thin magnesium alloy plate (strip) with a thickness of less than 0.5mm produced at home and ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22F1/06B21B1/40
Inventor 杜兴蒿武保林王大鹏万刚段国升洪敏东野生栓
Owner SHENYANG AEROSPACE UNIVERSITY
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